Symphyotrichum chilense

(Nees) G. L. Nesom

Phytologia 77: 277. 1995.

Common names: Common California or Pacific aster
Endemic
Basionym: Aster chilensis Nees Gen. Sp. Aster., 123. 1832
Synonyms: Aster chilensis var. invenustus (Greene) Jepson
Treatment appears in FNA Volume 20. Treatment on page 536. Mentioned on page 475, 537.

Perennials, 40–100 (–120) cm, colonial or cespitose; long-rhizomatous. Stems 1–5+, ascending or erect, glabrous or hirsute. Leaves thin, margins entire, apices usually acute, faces glabrous or sparsely puberulent; basal withering by flowering, petiolate, blades (linear-) oblanceolate to obovate, 30–200 × 4–40 mm, bases attenuate, margins entire to finely serrate, apices acute; proximalmost cauline sometimes withering by flowering, sessile, blades broadly to narrowly oblanceolate, 40–150 × 5–30 mm, bases usually ± attenuate or cuneate; distal sessile, blades lanceolate to oblanceolate, 25–90 × 5–30 mm, bases cuneate. Heads in open, paniculiform arrays, some branches at least 20+ cm. Peduncles puberulent, bracts 3–10, lanceolate to elliptic, margins often scabrous to ciliolate. Involucres campanulate, 5–8 mm. Phyllaries in 3–5 series, oblanceolate or oblong (outer) to linear (inner), unequal to subequal (outer usually shorter than inner, if so, lengths less than 3 times widths), bases scarious (outer) less than 1/2 or sometimes wholly foliaceous, inner scarious, margins eciliate or ciliolate, green zones oblanceolate to obovate or linear (innermost), apices (outer) obtuse, (inner) acute, faces glabrous or puberulent. Ray-florets 15–40; corollas violet, laminae 9–15 × 1.5–2.5 mm. Disc-florets 35–60+; corollas yellow, 4–8 mm, lobes triangular, 0.5–1 mm. Cypselae brown, cylindric to obovoid, not compressed, 3.5–4.5 mm, 2–4-nerved, faces hairy; pappi white to tawny, 4–8 mm. 2n = 48, 64, 96.


Phenology: Flowering Jul–Sep.
Habitat: Grasslands, salt marshes, coastal dunes and bluffs, coastal grasslands and scrub, open disturbed habitats in evergreen and Pacific coast coniferous forest
Elevation: 0–500 m

Distribution

V20-1196-distribution-map.gif

B.C., Calif., Oreg., Wash.

Discussion

Symphyotrichum chilense is restricted to coastal habitats from southwestern British Columbia to central California. It is almost entirely coastal in Oregon, Washington, and southern British Columbia, where it is mainly hexaploid (2n = 48). In Oregon, where it is sympatric with S. subspicatum, the latter is mainly duodecaploid (2n = 96). The distinction does not hold in British Columbia, however, where S. subspicatum is both 2n = 48 and 96, and where S. chilense is less common (G. A. Allen 1984). The species was erroneously thought by Nees to occur in Chile. The plants named Aster chilensis var. medius Jepson are hybrids of S. chilense and S. lentum.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Symphyotrichum chilense"
96 +, 64 +  and 48 +
not tailed +, rounded +  and obtuse +
distinct +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
subequal +
scarious +
4mm +  and 40mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +  and open +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Nees) G. L. Nesom +
foliaceous +, sessile +  and petiolate +
4 cm40 mm <br />0.04 m <br /> (15 cm150 mm <br />0.15 m <br />) +
cuneate +, attenuate +, oblanceolate +, acute +  and obovate +
scarious +
5mm;30mm +
Aster chilensis +
sessile +  and petiolate +
2.5 cm25 mm <br />0.025 m <br /> (9 cm90 mm <br />0.09 m <br />) +
lanceolate;oblanceolate +
5mm;30mm +
rugulose +  and muricate +
lanceolate +  and elliptic +
barbellulate +  and barbellate +
sessile +  and petiolate +
Common California or Pacific aster +
not 2-lipped +  and actinomorphic +
yellow +  and violet +
at maturity , more or less ampliate , tubes usually shorter +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
strigillose +  and glabrous +
not compressed +, cylindric +  and obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
B.C. +, Calif. +, Oreg. +  and Wash. +
0–500 m +
hairy +, puberulent +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Grasslands, salt marshes, coastal dunes and bluffs, coastal grasslands and scrub, open disturbed habitats in evergreen and Pacific coast coniferous forest +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
2 (?) +  and 5 (?) +
1.5mm;2.5mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
triangular +
serrate +  and entire +
not +  and hyaline +
30mm;200mm +
ciliolate +, eciliate +  and scabrous +
acute +, attenuate +, oblanceolate +  and obovate +
4mm +  and 40mm +
2-carpellate +
white +  and tawny +
persistent +
25 +  and 40 +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering Jul–Sep. +
oblong +  and linear +
unequal +  and subequal +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1mm;0.2mm +
branched +  and simple +
erect +  and ascending +
1 +  and 5 +
appendaged +  and truncate +
papillate +  and smooth +
Aster chilensis var. invenustus +
Symphyotrichum chilense +
Symphyotrichum sect. Occidentales +
species +
funnelform-campanulate +  and cylindric +
at maturity , more or less ampliate , tubes usually shorter +
ampliate +
100 cm1,000 mm <br />1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
cespitose +  and colonial +
40 cm400 mm <br />0.4 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, shrub +  and subshrub +
oblanceolate +  and obovate or linear +